Press Release

GCAL to Sponsor WDC Annual Meeting in Jerusalem

GCAL has announced its sponsorship of the WDC’s Fifth Annual Meeting,
to be held May 9-10, at the David Citadel Hotel in Jerusalem, Israel.

NEW YORK, NY ― May 2, 2007 ― Reconfirming its commitment to promoting social and ethical responsibility in
the diamond industry, Gem Certification & Assurance Lab (GCAL) has announced its sponsorship of the World
Diamond Council’s Fifth Annual Meeting, to be held May 9-10, at the David Citadel Hotel in Jerusalem, Israel.
GCAL is sponsoring the event’s Welcome Cocktail Reception on May 9.

World Diamond Council (WDC) was formed in 2000 to stop the flow of conflict diamonds through the implementation
of the Kimberley Process and System of Warranties. WDC’s Annual Meeting brings together government, nongovernment
and industry leaders in an open forum to discuss the issues at hand surrounding the eradication of the flow
of conflict diamonds. WGC represents more than 50 organizations worldwide – from mining companies and trade
associations to manufacturers and retailers. This year’s Annual Meeting is being hosted by the Israeli Diamond
Industry.

"GCAL is honored to be a sponsor of WDC’s Annual Meeting," noted Don Palmieri, President of GCAL. "WDC’s
focus on urging social responsibility within the global diamond industry to eliminate conflict diamonds perfectly
parallels GCAL’s own goals and certificate programs directed at protecting the consumer and giving them complete
confidence in the quality and origin of every diamond they purchase. For instance, GCAL is the only diamond
laboratory subject to the review and regulations of a publicly traded company, and is required by law to provide
full disclosure of its business operations. Also, we offer a Zero Tolerance Consumer Diamond Grading Guarantee on
all of our diamond grading certificates – the first and only guarantee of its kind in the diamond industry."

About Gem Certification and Assurance Lab
Gem Certification & Assurance Lab (GCAL) is a subsidiary of Collectors Universe, Inc., a NASDAQ Global Markets
traded company (CLCT NASDAQ listed). GCAL provides guaranteed diamond certification with bundled services
including Gemprint and direct light performance analysis as well as SourceVeritas and Ideal Cut certificates
(www.gemfacts.com). GCAL is the Official Diamond Laboratory of the
International Colored Gemstone Association for North America, the JCK Shows, Couture, and the JA Shows.

About Collectors Universe
Collectors Universe, Inc. is a leading provider of value added services to the high-value collectibles, diamond
and gemstone markets. The Company authenticates and grades collectible coins, sports, cards, autographs, stamps,
currency, diamonds and colored gemstones. The Company also compiles and publishes authoritative information about
United States and world coins, collectible sports cards and sports memorabilia, collectible stamps, diamonds and
gemstones. This information is accessible to collectors and dealers at the Company’s Web site,
www.collectors.com, and is also published in print.